WebDirect external access

I need to access to my webdirect server with my external IP (201.251.72....) . It works till the webdirect menu, but when I try to enter to any solution it redirects to the internal worker machine IP (192.168.8.27) and logically I loose the connection.

When you configured the worker to the master, did you use the external IP address for both master and worker in the two boxes in attached screenshot? If you used the internal IPs here, then the load balancer will redirect to those IPs when you try to actually open a file (but not when you just go to the launch center). Note this also means your routing/firewall rules will probably have to be such that your master and worker machines can see each other via their external IPs.